Best available cop



Nov. 20, 1923.

BEST AVAILABLE COP 1,474,528 7 w. HURST ELECTRICAL WATER HEATER Filed Dec. 25 1919 Patented Nov. 20, 1923.

se'sr AVA! LAB Liz be? WILLIAM HURST, OF WINNIPEG, lllIAINITOBA, CANADA.

ELECTRICAL WATER HEATER.

Application filed December 23, 1919. Serial No. 346,855.

To all whom it may concern:

Be it known that I, IVILLIAM HURs'r, of the city of lVinnipeg, in the Province of Manitoba, Canada, have invented certain new and useful Improvements in Electrical WVater Heaters, of which the following is the specification.

The invention relates to improvements in electrical water heaters, particularly as utilized to heat the water of the water cooling system of combustion engines and the principal object of the invention is'to provide an electrical heating attachment readily insertable in the water cooling system and which when connected electrically with a suitable source of electro-motive force will heat the water, sufliciently to establish a circulation and prevent the same from congealing or freezing. I A further and important object of the invention is to construct a heater such that, the heating element thereof will not obstruct to any extent theflow of the, cooling waters and which isarran'ged so that it can be attached as a unit in the water'cooling system. A still further object of the invention is to construct the heater with an offset permitting of the easy insertion of the heat ing element,thefelementbeing inserted at A'still further object of the invention is to provide a special coupling for attaching the heating element to the'casing.

A'still further ob'ect of the inventio is to arrange the coupling in a manner such that should there be no'water in the castherewill "be a natural tendency under the excessive heat'developed for thecoupling to 'come undone. v

With the above more important objects in viewthe invention'consists essentially in the arrangement and construction .of parts hereinafter 'more particularly described and later pointed out in the appended claims,-

reference being bad to the accompanying drawing in which Fig. 1 is a side viewo'f my heater-applied in the water circulating system of an automobile engine. Y 35711 l Fi 2 is a perspective view of the heater detac ed.

Fig.3 is a perspective view of the electrical heating element.

Fig. 4 is a perspective view of the bushing or coupling nut.

Fig. 5 is a horizontal longitudinal sectional view through the heater.

Fig. 6 is an enlarged detailed sectional view at 66 Fig. 5.

In the drawing like characters of reference indicate corresponding parts in the several figures.

1 represents an internal combustion engine such as an automobile engine and 2 an automobile radiator. 3 is the outlet water manifold or pipe leading from the water jackets of the engine cylinders to the top of the radiator and 4 represents the customary outlet pipe opening to the bottom of the radiator and connected through a hose connection and my heater with the water inlet manifold 5 of the engine. I

The above parts are of ordinary construction and for this reason are not herein further described.

The heater which I provide comprises connecting the element to the casing. -The casing is in the natureiofa pipe 9provided at one end with an outstanding circumscribing rib 10 and at'the other end in an elbow 11 terminating in a flanged head 12.-

Intermediately of'its length the pipe is formed with anofi'set 13 which provides a receiving chamber for the electrical heating element, the oifset being'in direct com-.

munication with the pipe. 'One endof the offset is faced as indicated at"14 andis interiorly screw' threaded as indicated atj15 to receive a bushingor coupling nut 16. 5

The electric heating element 7, which "I employ presents the following parts: 7

he heater 7 comprises a closed'cylinder 17 containing a resistance coil 18 wound on a porcelain or such like body and insulated by an enclosing mica or such like covering 19. 20 is a tubular neck extending from one end of the'cylind'er and terminating in a flaring cup 21 'which contains a pair of contact 'tips' 22 and 23 in direct electrical connection through the neck with there sistance coil.- r i The bushing-or coupling 16 'whilst screw threading into the threaded opening 15 is designed also to permanently carry the electrical heating element which is passed through it. I

In the present instance, the bushing is fitted with a central opening 24 of a dibe apparent that I can pass the cylinder 17 through the coupling 16 and afterwards solder the coupling to .th e neck.

The assembled heater is attached to the water inlet manifold of the engine by bolting the flange 12 to the manifold as shown.

art-26 and if-reference be made to Fig. 1 it will rbe apparent that the heater takes a slightly'inclined position with the offset 13 towards the engine whicl 1 is a desirable place as .-one-. obtains the benefit of the heat radi atedfromthe engine.

Thelower-end-of-the heater is connected -z-t0-.the pipe thya hose connection 27,

In actual practiceone connects the heaters to a suitable source ofele'ctro-motire force by inserting the common typeof well known push plug into the cup or socket 21, the push :plug making contact with thetips-22 and 23andheingin electrical connectiQB through suitable wires with the source of electrical energy. 1 Y Y When the heater is in operation the water -in which the cylinder 17 is immersed becomesheated andin so doing establishes a circulation through the water system of the cylinders, thereby preventing the water from freezing.

This device is of course particularly adapted for attachment to the water cooling system of an engine which is operating in cold climates and where low temperatures require the water to be kept heated to avoid freezing when the engine is not running.

I have found by actual demonstration that in instances where there is no water in the cooling system such as sometimes occurs my heater works automatically to short circuit the feed wires and blow out the fuse cus tomarily employed in such electrical circuits. This occurs in the following way 2- Due to the absence of water the heater and parts containing the same become intensely hot and the heat developed melts the solder whichallowsthe heating element 7 to drop and contact with the wall of the casing. After a short time the metal of the cylinder 17 will actually burn out and the. coil-'18 the wall of the casing.

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will contact with the casing and as soon as this occurs the fuse plug will blow out. Accordingly there is no possibility of a fire occurring as immediately the element is short circuitcd becomes electrically dead.

What 1 claim as my invention is l. The combination with the circulating water cooling system of a water jacketed engine, of an electrical water heater demounta bl inserted in the system at the inlet to the water jacket and having an inclined position and provided with an offset chamber extending towards the engine and containing the electrical heating element.

2. In a water heater, the combination with a casing, constitutin a fluid conduit, of a fluid heater comprising an electrical heating element supported within the casing, a neck portion extending from said heating element outwardly through the wall ofthc casing, contacts carried by the outer end of said neck portion electrically connected with said heating element, and means-for securing and supporting the heating element within the casing comprising a coupling nut surrounding the neck portion and secure% thereto by a fusible binding substance, sai coupling nut being threadedly engaged in 3. An electrical water: heater comprising an electrical heating element, a neck portion extending from "said heating element, electrical contacts carried by the outer end of said neck portion and electrically connected with su id heating element, and a coupling nut surrounding said neck portion and secured thereto by a fusible binding substance, the. bore of said coupling-nut being made larger. than the diameter oi the heating element to permit of the passage of the lattentherethrough when assembling the nut with the neck.

i. A liquid heating element comprising an open ended conduit formed with a lengthwise extending ofi'set having a transverse end wall, said cndwall being formed with an orifice, an electrical heater within the ofiset having an extremity within said, orifice and engaged rigidly with saidend wall, and meansexterior. to said offset and conduit for establishingelectrical connection with said heating element. 1

Signed at Winnipeg, this 27th da-y of November 1919.

WILLIAM HURST. In the presence of- GERALD S. ROXBURGH, K. B. WAKEFIELD. 

